From other records Sybil Hall m Titus R Cook and died in 1823. He then married Sophronia Kennedy who I find living near Percy & Minard on census records for MI so Sophia was not Titus' second wife. Did Sophia also marry a Cook? Or is the surrogate record wrong and should have stated Sophia's sister Sybil? For now I have left the children as sons of Titus and Sybil but more research is needed.